There is nothing of a planetary nature that exists that I am aware of. Currently, all atmospheric conditions would be produced by artificial means, such as a scuba diver taking a tank of pressurized air with him/her for the purpose of breathing underneath the oceans surface. On Earth, the atmosphere is 78% nitrogen, 21% oxygen, and 1% water vapor, carbon dioxide, and other trace gases. The thing that produces oxygen here on Earth is the plants and green plant-like organisms. They release oxygen as a waste product as they conduct photosynthesis, a process that makes glucose out of sunlight, carbon dioxide, and water. It would be possible to colonize a planet, maybe, that did not have oxygen in its atmosphere, as long as there were enough green plants and light from the sun to facilitate the process of photosynthesis. It would take a while, though, to achieve total planetary balance like it is here on Earth.
Hello! Earth is the only planet to live or you go to hell!
OK! If you really want to know than I think.......
we can explode many carbon dioxide bombs and plant the trees, after doing so I think there will be the atmosphere to live.
What do you think?